Four burners and 25,700 BTU in total describe the NGM3051UC, a 300 Series gas cooktop sized for a 30 inch cutout. Bosch built it for everyday cooking and not for wok-style heat, so it is gentler on the cabinetry and the ventilation around it than a high-output model would be.
It is a common choice above a wall oven, and that pairing is the first thing we look at. The gap from the bottom of the cooktop to whatever sits directly under it has to be right, and an installation that gets this wrong can cause trouble long after the day it was fitted.
With age the front-mounted knobs are the part that changes. Grease works into the shafts and turning gets stiffer, and the igniter ceramics can crack so that sparks go to the wrong spot. On a visit we measure clearance, free up the knobs, and then test each igniter in turn.
It can be done, but the clearance between them must meet the installation specifications. If the fit is tight, heat and the gas connection are the worry. We can check the gap on a visit.
No. Forcing it can damage the shaft. Stiffness usually comes from grease working into the valve stem. Turn it only as far as it goes comfortably and have us free it up properly.
It usually means the igniter ceramic has cracked, so the spark jumps elsewhere. The burner may then be slow to light. It is a small part, and we quote in writing before replacing it.
Book in about a minute, or call the desk. Same-day windows inside the Loop on most days, next-day across the rest of Houston.